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0650

The mystery of why some people appear to have healthy lungs despite a lifetime of smoking has been explained by UK scientists. We speak to Martin Tobin, a co-author of the new study.

0655

How does a party make new policy and what role can think tanks play in the formulation of policy? Nick Pearce is the director of the Institute for Public Policy Research (IPPR) and David Willetts is executive chair of the Resolution Foundation, and former minister for Universities and Science.

0710

Car CO2 emissions are vastly different to those claimed by car manufacturers according to a report out today. Greg Archer, vehicle programmes manager at the lobby group ‘Transport and Environment’, explains.

0715

Jeremy Corbyn has promised to re-shape the Labour party with more power for party members. It a move which has already rung alarm bells among some Labour MPs, who they fear they'll be purged if they disagree. As our assistant political editor Norman Smith reports, Mr Corbyn's team say they want to bring about change by persuasion, not punishment.

0720

A ‘supermoon’ lunar eclipse appeared in the sky during the early hours of this morning. Dr Sheila Kanani from the Royal Astronomical Society, speaks to us. Tweet us your pictures of the supermoon on our twitter handle #r4today.

0730

Sarah Montague met the former home secretary Alan Johnson, current head of Labour's campaign for EU membership.  He's described the EU referendum as ‘the most important political decision of his lifetime’.

0740

In his new book, theoretical physicist Carlo Rovelli has sought to explain the seven most important developments in modern physics, in a small volume of 78 pages. Is it really possible to convey these complicated ideas in such a short space? Mr. Rovelli is in the studio.

0750

President Obama will hold his first face to face meeting with his Russian counterpart Vladimir Putin in nearly a year, to discuss, among other things, the crisis in Syria. Ali Khedery is a former US official and currently chief executive of consultancy Dragoman Partners.

0810

John McDonnell will make his first Labour conference speech as shadow chancellor today, setting out radical plans to redistribute wealth. We speak to him from the Labour Party Conference in Brighton.


0830

The Russian President Vladimir Putin is due to address the UN General Assembly later today. His decision to switch focus to Syria seems to have had a knock on effect in Ukraine: in recent weeks there's been an abrupt reduction in hostilities in the East of the country. But that doesn't mean Ukraine's worries are over, as our diplomatic correspondent Bridget Kendall reports from Kiev.


0835

A revamped version of the classic children’s TV animation Danger Mouse starts on C´óÏó´«Ã½ today. It is the latest in the long line of children's classics to be remade over the last few years. Was there an era of peak children's television? We ask Dr Helen Wheatley, curator of the exhibition ‘The Story of Children’s Television, 1946 to Now’, and Kevin Eldon, the actor and comedian who plays ‘Penfold’ in the new series.

0845

It seems that talk of disunity within the party will dominate this Labour party conference. How will Labour leader Jeremy Corbyn negotiate the terrain? Polly Toynbee is writer for The Guardian and Duncan O'Leary is research director at DEMOS.

All subject to change.